Personally I don't open feed. But I always use boardman entrance feeders. Which is another technique that gets routinely "shot down." What I have found through my experience is #1 most people who advocate against it, have never actually done it. #2 the ones who have tried it, did so improperly and had issues. There are a lot of people who open fee with little to no adverse effects. Similarly, I use entrance feeders all the time, in fact it's all I use except for a couple of hive top feeders that I happen to own. I have never once had an issue with robbing, or inciting robbing, or really anything negative. The only downside I see is that when ambient air temps start to drop in the fall, the syrup doesn't stay as warm as it would with an internal / top feeder.
